Could it happen? Sure. Will it? Even if MacBooks Pro get LightPeak no other computer will have it short term. FireWire and MiniDisplay show Apple's not adverse to blazing new port trails, but adding things to iOS devices that most users won't use most of the time is something they've avoided. Could it be a hybrid USB/LightPeak port to increase usability? Why not a hybrid Dock/LightPeak port then?